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Rectifier - Damper Diode ·Rectifier

25CM3

Half-wave vacuum rectifier for television horizontal-deflection damper service, with a 25 V, 0.6 A heater adapted to series-string sweep circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
-
Nominal heater
25 V / 600 mA

Description

Half-wave vacuum rectifier for television damper service. Heater characteristics come from the supplied variant sheet; exact parent electrical characteristics are reused only when the explicitly referenced parent datasheet is already present in the project corpus.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
-
Nominal heater voltage
25 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier warm-up time
11 s

Abbreviated heater variant of 6CM3; parent electrical table not available locally, so unsupported promoted values were not invented.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristics

  • Heater voltage

    25 V

    Nominal heater rating from supplied sheet

  • Heater current

    600 mA

    Nominal heater rating from supplied sheet

  • Warm-up time

    11 s

    Average warm-up time from supplied sheet